Improved key-fastener



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@anni 619mm.

ROBERT S. DUN N IN G, OF FALLI RIVER, MASSACHUSETTS. Lewis Patent No.89,641, dated May 4, 1869.I

IMPROVED KEY-ASTENER.

The Schedule` reenerto in these Letters Patent and making part of thesame.

Be' it known that I, ROBERT S. Dumme, of Fall River, in the county ofBristol, and State of Mass'af chusetts, have invented a new and improvedKey- Fastener, for preventing burglars from entering lodging-rooms, byturning or removing keys whenlcft in the locks; and I` do hereby declarethat the following is a full and exact description thereof, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon.

My invention consists in a metallic bar, perforated with holes, a bolt,and a pin. The bar is aixed in the look, under the key; the bolt passedthrough the bow of the key, and also through the bar. The head 'of thebolt rests on the bow of the key. The piu secures the bolt in the bar. Y

Figure l is a perspective view of a door with my inventionapplied to theloek.

Figures 2 and 3 are sectional views of the bar. Figure 4 is aperspective view of the bolt. Fig. 1. A1 is the door. B1 is the .key inthe lock. i O is the bar, aixed in the lock, under the key.- D is thebolt, passing through the bow of the key, and also through the bar.

E is a pin, passing through the bolt, under the Fig. 2. A2 is theportion of the bar which enters the lock.

B, the part which projects, showing the holes through which the lowerpart of the bolt passes.

Fig. 3 is a proile view of thebar.

A8 isthev part which enters the lockI B3, the part which projects. y

The bar is curved, to accommodate it to keys which do not have bows, butdisks. When such keys are used, the bolt is placed between the disk andthe door.

Fig. 4 is the bolt, shown by D' in fig. 1.

The door being closed and looked, and the bow of the key lyinghorizontal, as herein shown; the bar O', fig. 1, being inserted inthelock below the key, and the `bolt D', fig.' 1, and pin E', fig. 1, axed,as also shown,

its novelty and utility will be apparent without further specification.

I do not claim any device previously invented or patented, for fasteningkeys; but

What I do claim as my invention, and desire to seeure by Letters Patent,is-` The key-fastener, constructed and applied substantially as hereinset forth.

ROBERTS. DUNNING. Witnesses:

J OHN Hnsknnn, B. E. WrNsLow.

